Regenerative coke oven



July 19, 1932. J. SCHAEFER REGENERATIVE COKE OVEN Filed 001;. 26. 1929 7 thereof durin this air which drives out the waste gases- Patented July 19, 1932 JOSEF SCHAEFER, OE DORTMUNDQGERMANY PATENT oFricEf REGENERATIVE COKE ovnlv Application filed October 26,1929, Serial No This invention relates to regenerative coke ovens and has more particularly reference to the means for reversing at determined'intervals the flow of the heating gases in ovens of this class, the objectof this reversal being to alternately preheat during a determined period of time the fuel gas by one group of regenerators and to reheat another group this time: by the escaping waste gases, w ereupon, inversely, these latter regenerators preheat the fuel gaswhile the first-named group is reheated againby the escaping waste gases. In coke ovens of this class three Way cocks are made use of among others for feeding the heating gases to the fiues to be fired which cocks on the one hand are connected to the gas main and on the other hand b two sockets to two gas branches one of wliich leads to the one group of heating flues and the other to the other 7 group thereof. i 7

Now in a heating arrangement of this design it is of advantage to prevent the heating gas when shut off from the one group of heating flues by these three way cocks, from at,

once entering the other group of flues, be-

cause these latter are still full of waste gases which have to be blown out therefrom before the heating gas can be ignited therein and heat them. This desired interruption-in the reversal of the gas flow from one group of heating flues to the othercan be realized in a very simple manner by using three way cooks the plug of which whenthrown over keeps closed during a short period of time the two branch conduits so that in the reversal of the 7 gas flow first the air of combustion enters the heating flucs to be flamed anew, and it is flow reversing arrangement is improved by the plug of the three way cocks being provided with a supplementary passage by which air is fed to the one or better to both of the two branch conduits during that period of time where they are out of connection with the gas .4024655, and in German December 27, 1928.} 7

main. In entering the oven from the-branch conduits this air causes eventual deposits in the gasdistributing passages and burners of the oven and eventually also in the heating flues to burn away. Another advantage afs forded by driving air through the as branch conduits leading to the heating ues while the gas is shut off from both groups of flues consists in the fact that atmospheric pressure is avoided within the heating flues which phenomenon is to be ob served; in the reversal of flow otherwise during the time the fiues are out'of communication with the gas supply, and causes distillation gases to pass from the oven chambers through eventual leaky walls to'thje" heating 'flues. V V V V In order that the invention can be more easily understood, a reversal arrangement comprising three-way cocks according to the any pressure below 60 invention is illustratedby' :Way of' example in the accompanying drawing in which 7 Figure-1 is a' sectionalwiew of an indi vidualthree-way cock in connection" with the j gas main and the gas branch conduits,

Figure '2 I the cock in another position, V

Figure3 is a longitudinal section'through a,

main from which the heated gas to be ignited is fed to the heating flues of the coke oven" chambers, h denotes the three-way cocks attached to the gas main a, while 79 denotesthe plug of these cocks h which is fitted with an angular bore 2'. b and 0 denote the branch conduits leadingfrom each three-way cock h "to the groups of heating fiues d and alternatively feeding the gas to the group to be fired.

As to be seen best from Figure 2, the plug 7 s p bore 2' is so dimensioned and the angleincluded on the cock by the branch conduits b, c, is so wide; that with the bore 2' in an intermediate position between the branches 1) and c the plug is closes these branches.

Now the plug la is fittedon each side of the 7 7s is a-similar view withthe plugof p bore i with passages which connect the two branches 1), c with an air in1et,'that is, with the outer air in that posltion of the plug, Figure 2, in which the branches 5, 0, do not communicate with the plug bore 2'. In this position of plug'bore i in which the gas main a is thus shutofi' from the branches b, 0, air is supplied 7 in a suitable quantity to branches 6, 0 through the passages j and through these branches to 10 the gas distributing channels of the oven 7 and to the burners arranged in the'heating flues, and to the latterthemselves and burns away eventual deposits therein before the normal heating of and, the escape of the waste gases from, the heating flues commences.

I WhatI claiinand'desire to's'ecure by Let- 1 'te'rs Patent is:- i 1'. In a regenerative coke oven he'atingflue system, the combination with the heating flues adaptedto be a fired alternately, of a gas main, branch pipes leading from the. gas Vmain to the heating fiues,-a three-way valve inserted between the, gas main and branch conduits for controlling the admitting of the 2 gas from the gas main alternately to one or I other heating flues through its branch conduit, and means incorporated in the valve for admitting air to, a heating flue through its branch conduit prior to the admission of gas 7 thereto for expelling the previously. combustd gas i s h ing fil et" a a T 2. In a regenerative coke oven heating flue system, a three-way valve having its two out lets'connected respect vely to the fines and its I 5 inlet connectedto thesourc'e of gas supply and I I including'a rotatable plug having a passage therein'for establishing communication be- 7 tween the inlet and the outlets alternatively,

saidplug having a supplemental passagefor supplying fresh air, alternatively to the heating flues upon the-plug closing communication between the inlet and the alternative out-f lets. Y .Y JOSEF SCHAEFER. 

